Mixed paint and method of making same.



UNITED STATES PATENT OFFICE.

WILLIAM F. DOERFLINGER, or NIAGARA FALLS, NEW YORK.

mxnn PAINT AND manic]: or MAKING SAME.

Specification of LettersPatent.

Patented April 14, 1908.

Application filed September 14, 1906; Serial No. 384,677.

To all whom it may concern:

Be it known that I, WILLIAM'F. Donn- FLINGER, a citizen of the United States, re-

siding at Niagara Falls, in the county of N iag-' that it cannot again be satisfactorily mixed with the liquid ingredients of the paint. Others of these paints are of such thin viscosity as to float the pigments very imperfectly,

require a disproportlonately large amount of bronze powder, and produce thin coats of poor appearance and little durability.

Others of these paints produce coats which are either dull and unattractive when new or soon lose their luster.

The object of this invention is to produce a read mixed bronze or gold paint which is free om these defects and which produces a lasting coat of fine appearance.

In practicing this mvention I employ a solution of an organic acid ester in a volatile solvent which does not injuriouslyreact with the bronze powder such ester being a colloid ester which is solid at ordinary temperature and forms a cohesive film upon the evaporation of the solvent. I prefer to employ the or anic acidesters of cellulose, for instance, ce-

ulose acetate or cellulose butyrate, but.

other colloid organic acid esters may be employed, for instance, acetate of starch.

- The solvent is selected with reference to the particular ester which is-employed and also with reference to the bronze or other f neutral materials are employed the ster; is simply dissolved in the solvent and the" bronze powder is mixed with the solution. Ordinary commercial materials usually contain a trace of acid and when such materials are employed a suitable neutralizing agent is i added brilliant coat which which does not injuriously react with the other ingredients. The neutralizing agent is preferably employed in excess to insure a complete neutralization and the excess is allowed to settle or is removed in some other suitable way.

As an example of the ractice of my invention, 6 ounces of cellu ose acetate are dissolved m one gallon of acetone, and 8 ounces of anhydrous sodium carbonate are added.

The solution is well stirred, allowed to settle, the clear solution is decanted off, and 1.5 pounds of metallic old bronze powder are mixed therewith. T ebronzepowder is usuall an alloy of copper with one or several lighter metals, for instance, zinc, tin or aluminium. Other substances may be added to the above mentioned ingredients, as the particular purpose for which the paint is designed may render desirable. Such additional substances should be of such nature or should be so treated that they do not react injuriously with the bronze or other powder or the tin cans or other receptacles. Gum resins and oils, partlcularly castor oil, may be so empleiyed. 4 he mixed paint keeps well in tin cans andother vessels, does not react with the bronze powder or the tin of the cans, works well under the-brush, and produces a durable and preserves its luster for a long time.

I claim as my invention:

1. A read mixed paint comprising a solution-of cellu ose acetate in a volatile solvent and a pigment containing metallic old bro.nze powder, substantially as set fortl i.

2. A ready mixedpaint comprising a pigment containing bronze powder, and a solution of or anic acid collo1d ester in a volatile solvent which does not react with the bronze powder, substantially as set forth.

3. 'A ready mixed paint comprising a pigment eontainmg metallic gold bronze powder, and a solution of cellulose acetate in acetone,substantially as set forth.

4. The method of preparing a ready mixed paint which consists in reparing a neutralsolution, in a volatile so vent, of an organic acid ester which is solid at ordinary temperature and forms a cohesive film uponthe eva oration of the solvent, and mixing with t e solution a pigment containing bronze powder, substantially as set forth.-

5. The method of preparing a ready mixed paint which, consists in preparing a solution,

in a volatile solvent, of an organic acid ester react I with the same, substantially as set 10 which is solid at ordinary temperature and forth. v

forms a cohesive film upon the evaporation of Witness my hand in the presence of two v the solvent, neutralizing the solution, and witnesses.

' mixing therewith a pigment containim 1 bronze powder, substantially as set forth. b WILLIAM DOE RFLIN 6. A ready mixed aint com rising me- Witnesses: tallic gold bronze pow er and a so ution of an LILIAN M. DOERFLINGER,

organic acid ester of cellulose which does not I CAROLINE Y DOERFLINGER. 

